XML 37 R22.htm IDEA: XBRL DOCUMENT v3.8.0.1

Employee Benefits	12 Months Ended
	Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract]
Employee Benefits	13. Employee Benefits The Company maintains a 401(k) plan for all eligible employees.  The Company’s operating results include expenses of approximately $8.7 million in 2017, $4.4 million in 2016 and $7.1 million in 2015 for the Company’s contributions to the plan.

X

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Name:	us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration